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// Êý¾Ý¿âÀàÐÍ
'type'        => 'mysql',
// ЧÀÍÆ÷µØµã
'hostname'    => 'localhost',
// Êý¾Ý¿âÃû
'database'    => 'database_name',
// Êý¾Ý¿âÓû§Ãû
'username'    => 'root',
// Êý¾Ý¿âÃÜÂë
'password'    => 'root',
// Êý¾Ý¿â±àÂë
'charset'     => 'utf8mb4',
// Êý¾Ý¿â±íǰ׺
'prefix'      => '',

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// Êý¾Ý¿âÅþÁ¬²ÎÊýÉèÖÃ
'db_config'       => [
    // Êý¾Ý¿âÀàÐÍ
    'type'        => 'mysql',
    // ЧÀÍÆ÷µØµã
    'hostname'    => 'localhost',
    // Êý¾Ý¿âÃû
    'database'    => 'database_name',
    // Êý¾Ý¿âÓû§Ãû
    'username'    => 'root',
    // Êý¾Ý¿âÃÜÂë
    'password'    => 'root',
    // Êý¾Ý¿â±àÂë
    'charset'     => 'utf8mb4',
    // Êý¾Ý¿â±íǰ׺
    'prefix'      => '',
    // Êý¾Ý¿âÅþÁ¬²ÎÊý
    'params'    => [
        PDO::ATTR_CASE => PDO::CASE_NATURAL, // ²»¾ÙÐоÞϸдת»»
        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, // Å׳öÒì³£
        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC, // ĬÈÏÒÔ¹ØÁªÊý×éÐÎʽ·µ»ØÊý¾Ý
    ],
],

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ÔÚconfig.phpÖÐÌí¼ÓÈçÏ´úÂëÆôÓÃÊý¾Ý¿âÉèÖü°²ÎÊý£º

// Êý¾Ý¿âÏà¹ØÉèÖÃ
'default_return_type' => 'array', // ĬÈÏ·µ»ØÊý¾Ý¼¯ÀàÐÍΪÊý×é

// Êý¾Ý¿âÉèÖÃ
'db_config'       => require_once(APP_PATH.'database.php'),
'database'        => $db_config['database'], // Êý¾Ý¿âÃû³Æ
'prefix'          => $db_config['prefix'], // ±íǰ׺

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$users = Db::name('user')->select();
dump($users);

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$user = Db::name('user')->where('id', 1)->find();
dump($user);

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$count = Db::name('user')->count();
echo $count;

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$usernames = Db::name('user')->column('name');
dump($usernames);

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ÒÔÉÏ´úÂëÖУ¬column(‘name’)ÌåÏÖÖ»ÅÌÎÊuser±íÖеÄnameÁУ¬$usernames±äÁ¿Öд洢µÄ¼´ÎªÅÌÎÊЧ¹û¡£

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$userinfos = Db::name('user')->field('name,age')->select();
dump($userinfos);

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ÒÔÉÏ´úÂëÖУ¬field(‘name,age’)ÌåÏÖÖ»ÅÌÎÊuser±íÖеÄnameºÍageÁ½ÁУ¬$userinfos±äÁ¿Öд洢µÄ¼´ÎªÅÌÎÊЧ¹û¡£

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$users = Db::name('user')->where('age', '>', 20)->select();
dump($users);

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ʹÓÃÔ­ÉúSQLÓï¾äÅÌÎÊ

$users = Db::query('select * from user');
dump($users);

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'default_return_type' => 'array',

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'default_return_type' => 'object',

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'default_return_type' => 'json',

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